Expansion-joint



(Model.)

W.` FORMAN.

EXPANSION JOINT. No. 250,904. PatentQd-D'ec. 13.1881.

UNITED STATES PATENT OFFICE,

WILLIAM FORMAN, OF BRADFORD, PENNSYLVANIA.

EXPANSION-JOINT.

SPECIFICATION forming part of Letters Patent No. 250,904, dated December 13, 1881.

Application filed June 29, 1881.

To all whom it may concern:

Be it known that I, WILLIAM FORMAN, a citizen ofthe United States, residing in Bradford, in the county of McKean and State of Pennsylvania, have invented certain new and useful Improvements in Expansion-Joints, of which the following is a specitication.

The object of myinvention is to provide for the expansion and contraction of long lines of steam-pipes, water or oil pipes; and it consists of a cylinder or case having a stutting-box on one end and a pipe extending through it, or partly through it, or into it, and tightly fastened on theinside at the opposite eud,in coinbination with a tube adapted to [it nicely and slide within the case over the tube attached to the interior of the case, the tubes being provided with the usual screw ends to connect with a line of pipe, as and for the purposes which will be more clearly hereinafter shown by reference to the drawings, in which- Figure l is a side elevation; Fig. 2, an en d View; and Fig. 3 represents a vertical longitudinal section through line X X, Fig. 2.

A is the case. It is provided with a square or nut end, B, so that a wrench may loe used to hold it while attaching the pipe.

To the inside end, B', of the caseA is firmly attached a tube, C, (see Fig. 3,) thereby leav- (Model.)

through the joint; and it will be further seen that the danger ot leakage is much less than it would be without the tube G, becausein case of a leakage the vapor or liquid would have to pass along a nearly-closed annular space between the outer side otl C and inside of D, and then between the closely-fitted outside ofD and inside of the case to the stuffing-box.

I claim as my invention- An expansion-joint consisting of the case A, provided with a stufting-box, E, and an interior tube, C, in combination with` a movable tube, 1), for the purposes described.

WILLIAM FORMAN. Witnesses:

JAMES SANGSTER, A. J.. SANGsfrnR. 

